Segwit is good idea but an increase would required
Segwit should increase the transaction capacity to ~180-190% (or even more depending on use cases). This is close enough to a 2 MB block size limit (keep in mind that there is no guarantee that miners won't use their soft limits again). An increase is most likely going to happen, the question is just when.
you have try to post on r/bitcoin about xt or classic ?
You should know how contentious HF's are viewed in these places by now. Implementations that don't break consensus are allowed (AFAIK). I'm not involved in either subreddit so I can't say much.
A larger blocksize will make a spam attack more expensive, no?
Not necessarily.
ANd that is also why it is urgent to have a block size increase.
No.